Anonymous
Philosophy Of Space Travel 2016-05-14 16:47:04 Post No.8073976
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Philosophy Of Space Travel 2016-05-14 16:47:04 Post No.8073976
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Philosophy Of Space Travel
Anonymous
2016-05-14 16:47:04
Post No. 8073976
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I have worked out three key reasons why space travel stagnated and I don't think the end of the Cold War or even cost has much to do with it.
1) The lack of super-heavies. Saturn V worked, it could have gotten a base on the Moon and even to Mars. Unfortunately everyone balked at the cost. We then started dicking around with LEO spaceplanes that didn't do much and didn't even work good, thus wasting about 50 years. The Russian story was even worse, theirs plain blew up ensuring that they could never be a competitor to the USA in deep space. People say the end of the Cold War ended the space race but that ended in 1991 yet human spaceflight was dead by 1972. Russian competition really died with the N-1 not the end of the Soviet Union. Luckily the SLS and the Falcon Heavy are being constructed so this problem is now fading.
2) Public aversion to nuclear. Chemical got us to the Moon but it's inadequate for interplanetary spaceflight. An all chemical mission to Mars is barely possible. As for a base on Pluto? Utterly impossible. Any significant payload would take 20 years to get there. We need to rip up that fucking nuclear test ban treaty so we can start flying nuclear thermal, fusion and even nuclear pulse rockets.
3) Not opening space to all. I don't think that the public not wanting to pay was the issue, I think that the public getting tired of paying to send just five guys into space after 30 years of paying is what caused them to lose interest. Imagine if after Christopher Columbus's first few trips he kept on asking for more and more money to send himself to America. No-one else can ever go, just him and his crew. People would stop supporting so what really happened is that explorers started taking more and more people and eventually colonizing. If your family is on Mars you can be damn sure that you will keep on paying for the super-heavies needed to keep them in contact. Luckily SpaceX is trying to do this.
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>>8073976
I know I said cost doesn't have much to do with it but then said people didn't want to pay for Saturn V but what I mean is that if they had a good reason to pay they would have so cost wasn't the core reason.
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>>8073976
>that ended in 1991
i dont care about meme travel but the wall fell in 89 m8o
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>>8074032
Whatever /his/ still way after 1972.
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what is the commonly accepted idea/principle/axiom, that if proved false, would single-handedly revolutionarize the most science/maths ?
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>>8073958
Theory of relativity, we'll overcome the Judenphysik once and for all
/thread
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P not equal to NP
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theory of intelligent design
Hello /sci/,
My neuroscience exam is on Wednesday and I don't think I covered everything and I feel uneasy about it. Any neuroscientists here to give quick help?
Thanks in advance.
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How many hours do you study a day?
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ask away
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>>8073948
Most of the day. 6 hours.
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So I'm finishing my third year in bioengineering with a minor in chemistry and I'm thinking about continuing in Nanobiotechnology. I've always made my study choices regarding my general interests, not with a specific job in mind.
Now I'm curious about where I could land, what kind of jobs can i expect to apply for or land with a degree in bioengineering specialised in nanobiotech?
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>>8073925
Big pharma, insilico drug design, screening, docking.
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>I've always made my study choices regarding my general interests
>what kinds of jobs can I expect to apply for
>nanobiotech
You're a gambling man then? That field basically does not exist in industry yet. Unless it catches on commercially soon you can expect to do nothing in nanobiotech
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>>8074952
i guess i am attracted bu the "futuristic" aspect of nanobiotech... regardless, this specialisation has been available for over 10y in my university so surely there's a certain job niche for this field
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Taking differential equations course, this is text:
Ordinary Differential Equations, Zill, 9th edition
is this good?
besides book does anyone have any online resources to help with course (eg khan)??
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i think the real name of the book is
First Course In Differential Equations Ed: 9
not sure why they listed it with a different title
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>>8073867
>9th edition
>is this good?
No.
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You'll find this useful.
http://users.math.msu.edu/users/gnagy/teaching/ode.pdf
Why did the soviets have such a high failure rate?
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>>8073813
Fear rarely gets things done successfully
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>>8073813
The scientists had literally no say in anything. When your fascist leader says launch, you launch even if you know it will blow up.
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Government, an incompetent government
Suppose some powerful interest groups enact policies that are extremely unfavorable to older generations, is it safe to say that once they die off, their offspring would willingly accept those unfavorable polcies as "normal"?
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If you doctrine new generations your twisted ideas, they can even kill people thinking they're doing something good.
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North Koreans love Kim... They worship him like a god, of course it would seem normal to them
Refer to gullivers travels
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Unless these policies cause the younger generations harm. This is especially the case with mass immigration, which will lead to and is causing reactionary (and perhaps even revolutionary) thought across the West in the younger generations.
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What should a mathfag know about computation and computation complexity theory?
What are the most important concepts to know, apart from the undergrad CS stuff?
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>>8073794
Just remember, O(log n) is the best my manno.
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>>8073794
>Combinatorics (because it leads onto) combinatorial optimization
>Numerical analysis
>Variational principles
>Algorithmic Graph Theory
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>>8073794
>apart from the undergrad CS stuff?
the grad CS stuff
I've been out of the loop for a while now. What happened to the EM drive?
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>>8073787
dead meme
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>>8073787
It became a meme.
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>>8073787
And on the third post it will rise a meme once again.
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ITT: we bitch about things technology is bringing into our lives like the grumpy old men we are at heart
I hate electric stoves. It's kinda cool that you can use them as a benchtop when you're not cooking, but they take forever to heat up and you can't pick the pan up and tilt it like you can over a gas flame. Plus the immediate whoosh and heat you get when you light a gas stove with a lighter is just so satisfying.
I kind of feel the same about electric cars (despite never being anywhere near one) - I like the way my car rumbles and the feeling of changing gears. Feels strange knowing that in a few generations everyone will grow up driving electric.
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I hate fucking airplanes. I used to love the times we spent 4 months to travel from one country to another on horses with making 5000 stops on the way. Now you hop on to an airplane and get there in a few hours its just ridiculous.
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>>8073727
>they take forever to heat up
I think you should change your stove
I agree with the electric car thing, not because of the feeling, but because they're getting so much hype when they hardly improve the existing situation. It feels like a lateral move, at best. Not to mention batteries aren't the most reliable technology out there.
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I like gas because you can char with it
Anonymous
Gravitational Wave Observatories 2016-05-14 12:50:29 Post No.8073677
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Gravitational Wave Observatories 2016-05-14 12:50:29 Post No.8073677
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Gravitational Wave Observatories
Anonymous
2016-05-14 12:50:29
Post No. 8073677
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What's been going on at LIGO in the past few months?
They've detected the first gravitational wave within 12 days, so shouldn't there have been some more discoveries by now? It's an observatory, after all.
This topic blew up in February and then died immediately after although it's essentially an entirely new way to learn about our universe. Why?
Also gravitational waves general I guess, I've done some research on them in the past couple of weeks and I can answer questions
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>>8073677
Do we need big observatories like LIGO to detect them? Is it possible to reduce the size of the observatories?
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>>8073681
The bigger the observatory, the more sensitive it is. The amplitude of a gravitational wave essentially decides how large the proportional change in length of an object will be.
If you've got a really large observatory, then, the absolute length difference between the arms will also be really large in comparison to a small observatory. And the greater the length difference, the more the two light waves will be out of phase.
So you would really just want to go even bigger. You could probably lower the size if you increased the sensitivity through other means to make up for it, but that would require better technology (such as more powerful lasers or higher quality mirrors). Increasing the size is an easy way to improve the sensitivity.
Something else that might be interesting: The lasers don't just travel the 4 km of the arms, they actually travel around 1120 km. The beams get reflected between the arms for a while before hitting the photo detector which lets them travel an even longer distance.
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isn't detecting gravitational waves as proof of Einstein affirming the consequent?
Also, how are gravitational waves observed and attributed?
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Possible to do hard math/physics on ketogenic diet?
Do you know any people that do that?
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>>8073641
Any diet is fine as long as your iq is high enough (160 master race reporting in)
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>>8073641
unless medically required, keto is fucking stupid
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>>8073657
except if your IQ becomes 100 after 2 hours of math
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>Make thread about black science man discussing that transgenderism has to be real if /sci/ believes that men and women have different minds
>Some other anons agree and post studies that show that transgender people do indeed have the brain structure of the gender they believe they are
>/pol/ types come out with the most ridiculous arguments possible, "I have no counter evidence, I just believe the concept is silly and probably correlation fishing"
>If that wasn't childish enough, mods have now deleted the thread
So this is how /sci/ works. If someone posts a thread that homos are bad or whatever that becomes a 300 reply circlejerk with many anons claiming the "establishment is suppressing the truth". But here's the funny thing: When someone posts evidence for something that you don't want to believe in /sci/ deletes the thread.
If I am a "conspiritard" for saying /sci/ is suppressing alternative views then I would like to know why I regularly see racebait and anti-homosexuality threads go to 300+ replies but a pro-transgender thread got deleted after 74.
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Reported :^)))
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Do you have a link to those brain structure studies?
Out of the two facial recognition sites, pictriev and betaface.com, which do you think is more accurate?
Pictriev determines a person's masculinity/feminity and age along with celebrity lookalikes.
Betaface.com measures all of the above + various other things such as race,
hair colour, face shape, nose shape, eye distance, eye shape etc.
The thing is-
>I always get related to african american celebrities on pictriev (im half indian half white, with a slight tan)
>I always get detected as white by race in betaface.com..
So what do you guys think? Pic not related
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Post pic of yourself so we can answer the question.
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>>8073528
The question has nothing to do with me. It is about the accuracy of the facial recogition apis.
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>>8073550
Just wanna see you're pretty, tan face, op.
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Would this be a suitable way to kill a nerve in a tooth, /sci/? Would it be too risky in case I spilled some on my gums?
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>>8073516
All of us can read color coded 3d models.
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>>8073516
Maybe if you hit hard enough. That contraption seems more fragile than a tooth, though.
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>>8073523
but you cant read filenames it seems